Improved machine for refitting stop-valves



UNITED STATES PATEWE SAMUEL WING, OF MONSON, MASSACHUSETTS, ASSIGNOR `TOHIMSELF AND GEO. R. TOPLIFF, OF BROOKLYN, NEW YORK.

IMPROVD MACHINE FOR REFITTING STOP-VALVES.

Specification forming part of Letters Patent No. 449,203, dated August1, 1865.

clear, and exact description thereof, which will enable those skilled,in the art to make and use the saine, reference being had totheaccompanying drawings, forming part of' this specification, in which-Figure l represents a longitudinal vertical section of the part used forretittin g the valves,

.the line a; x, Fig. 2, indicating the plane of section. Fig. 2 is aplan or top view of the same, partly in section. Fig. 3 is a sideelevation of thepart used forrefittin g the valve-seats, showing itsoperation.

Similar letters of reference indicate corresponding parts.

Stop-valves otthat class commonly known under the term of globe valvesare usually made with conical valves secured to a screwspindle andfitting into aconical seat. If a valve of this class becomes leaky, theonly way to retit the same heretofore has been by regrinding, or, ifthat operation was insufficient or too slow,by unscrewing the stop-valvefrom its connecting-pipes and sending it to the shop, where it would bereftted ou the turning-lathe or with the proper tools. Either of theseoperations causes much loss of time and of money. A simple and effectivedevice by which the operation o f retitting said stop-valves would becarried out in a short time and without dis'- connecting the valve fromthe pipes has been a desideratum which will be hailed with delight byeverybody who is troubled with leaky valves.

The device which forms the subject-matter of this present invention, andwhich is intended i to till the want above pointed out, consists of twoparts, one for rettin g the valves and the other for retting theseats.The former consists of a conical concave mill made in the precise formwhich the valve isto have, and provided vvith a yielding internalcenter, in combination with suitable bearings, two for said concave milland one or more for an adjustable center, in such a manner that byremoving the valve from the seat and placing it between the adjustableand the yielding centeritis at oncein the proper position to be actedupon bythe concave mill,and a few revolutions of said concave j l mill,imparted to it by an ordinary ratchetbrace, or any other suitablemeans,produce the desired ei'ect on the valve and bring it in therequisite shape to lit into its seat. The part for reltting the seatsconsists of a conical mill or reamer with a cylindrical stem, to beused, in combination with a guide which is made to take the place of thestu'tng-box andnut through which the valve-spindle passes, in such amanner that by removing said box, with the valve and valve spindle, andinserting therefor the conical mill audits guide, a few revolutionsgiven to said mill will bring the seat in the proper shape, the wholeoperation being performed without removing the stop-valve from itsconnecting-pipes.

A represents a bed-plate, cast or otherwise produced of iron or othersuitable material, and provided with two heads, a, which form thebearings for the stern ot` the concave mill B, and with another head, b,which forms the bearing for the adjustable center (l. The concave mill Bis formed to correspond tothe desired l form ot' the valve, and it isprovided with an internal center, c, made yielding by the action ot' aspring, d, which is placed against its inner end, as clearly shown inFig. 1 of the drawings. A square, e, at the end ofthe stein ofsaidconcave mill, serves to impart to the same the desired rotary motion bya ratchet-brace or any other suitable means. The adjustable center C isretained in the desired position by the setscrewf.

The valve to be reiitted is taken out ot its seat and placed between thecenters C c, and

by imparting to the conical mill a few revolutions, pressing it at thesame time toward the center C, thc desired effect ou the valve isproduced. The seat is relitted by the aid of a conical mill, D, andguide E. When the valve, with its stun g, has been removed from its seatthe mill D, with its guide E, is inserted in its place, and by turningsaid mill round a few times th seat resumes the desired shape.`

being required because the box cannot be removed from the valve spindle,which bears the valve at one and a hand-Wheel at the other end.

The entire machine is very/simple7 and by its aid the stop-valves can bereiitted With little loss of time and Without removing said valves fromtheir connecting-pipes.

Having thus described myinvention, I claim as new and desire to secureby Letters Patent- 1. The concave mill B, provided with an internalyielding center, c, and arranged in suitable bearings, a, in combinationwith the ad' justable center C, constructed and operating substantiallyas and for the purpose set forth.

2. The guide E and conical mill B, applied in combination with eachother, substantially as and for the purpose described.

SAMUEL WING.

Witnesses:

RUFUS F. FAY, CARLOS S. PEGK.

